[backend] fix: 修复异常处理和类型转换问题

frontend/node_modules/eslint-scope/dist/eslint-scope.cjs

@@ -1499,4 +1499,742 @@ class PatternVisitor extends esrecurse__default["default"].Visitor {
 const { Syntax } = estraverse__default["default"];
 
 /**
- * Traverse identifier in p
+ * Traverse identifier in pattern
+ * @param {Object} options options
+ * @param {pattern} rootPattern root pattern
+ * @param {Refencer} referencer referencer
+ * @param {callback} callback callback
+ * @returns {void}
+ */
+function traverseIdentifierInPattern(options, rootPattern, referencer, callback) {
+
+    // Call the callback at left hand identifier nodes, and Collect right hand nodes.
+    const visitor = new PatternVisitor(options, rootPattern, callback);
+
+    visitor.visit(rootPattern);
+
+    // Process the right hand nodes recursively.
+    if (referencer !== null && referencer !== undefined) {
+        visitor.rightHandNodes.forEach(referencer.visit, referencer);
+    }
+}
+
+// Importing ImportDeclaration.
+// http://people.mozilla.org/~jorendorff/es6-draft.html#sec-moduledeclarationinstantiation
+// https://github.com/estree/estree/blob/master/es6.md#importdeclaration
+// FIXME: Now, we don't create module environment, because the context is
+// implementation dependent.
+
+class Importer extends esrecurse__default["default"].Visitor {
+    constructor(declaration, referencer) {
+        super(null, referencer.options);
+        this.declaration = declaration;
+        this.referencer = referencer;
+    }
+
+    visitImport(id, specifier) {
+        this.referencer.visitPattern(id, pattern => {
+            this.referencer.currentScope().__define(pattern,
+                new Definition(
+                    Variable.ImportBinding,
+                    pattern,
+                    specifier,
+                    this.declaration,
+                    null,
+                    null
+                ));
+        });
+    }
+
+    ImportNamespaceSpecifier(node) {
+        const local = (node.local || node.id);
+
+        if (local) {
+            this.visitImport(local, node);
+        }
+    }
+
+    ImportDefaultSpecifier(node) {
+        const local = (node.local || node.id);
+
+        this.visitImport(local, node);
+    }
+
+    ImportSpecifier(node) {
+        const local = (node.local || node.id);
+
+        if (node.name) {
+            this.visitImport(node.name, node);
+        } else {
+            this.visitImport(local, node);
+        }
+    }
+}
+
+// Referencing variables and creating bindings.
+class Referencer extends esrecurse__default["default"].Visitor {
+    constructor(options, scopeManager) {
+        super(null, options);
+        this.options = options;
+        this.scopeManager = scopeManager;
+        this.parent = null;
+        this.isInnerMethodDefinition = false;
+    }
+
+    currentScope() {
+        return this.scopeManager.__currentScope;
+    }
+
+    close(node) {
+        while (this.currentScope() && node === this.currentScope().block) {
+            this.scopeManager.__currentScope = this.currentScope().__close(this.scopeManager);
+        }
+    }
+
+    pushInnerMethodDefinition(isInnerMethodDefinition) {
+        const previous = this.isInnerMethodDefinition;
+
+        this.isInnerMethodDefinition = isInnerMethodDefinition;
+        return previous;
+    }
+
+    popInnerMethodDefinition(isInnerMethodDefinition) {
+        this.isInnerMethodDefinition = isInnerMethodDefinition;
+    }
+
+    referencingDefaultValue(pattern, assignments, maybeImplicitGlobal, init) {
+        const scope = this.currentScope();
+
+        assignments.forEach(assignment => {
+            scope.__referencing(
+                pattern,
+                Reference.WRITE,
+                assignment.right,
+                maybeImplicitGlobal,
+                pattern !== assignment.left,
+                init
+            );
+        });
+    }
+
+    visitPattern(node, options, callback) {
+        let visitPatternOptions = options;
+        let visitPatternCallback = callback;
+
+        if (typeof options === "function") {
+            visitPatternCallback = options;
+            visitPatternOptions = { processRightHandNodes: false };
+        }
+
+        traverseIdentifierInPattern(
+            this.options,
+            node,
+            visitPatternOptions.processRightHandNodes ? this : null,
+            visitPatternCallback
+        );
+    }
+
+    visitFunction(node) {
+        let i, iz;
+
+        // FunctionDeclaration name is defined in upper scope
+        // NOTE: Not referring variableScope. It is intended.
+        // Since
+        //  in ES5, FunctionDeclaration should be in FunctionBody.
+        //  in ES6, FunctionDeclaration should be block scoped.
+
+        if (node.type === Syntax.FunctionDeclaration) {
+
+            // id is defined in upper scope
+            this.currentScope().__define(node.id,
+                new Definition(
+                    Variable.FunctionName,
+                    node.id,
+                    node,
+                    null,
+                    null,
+                    null
+                ));
+        }
+
+        // FunctionExpression with name creates its special scope;
+        // FunctionExpressionNameScope.
+        if (node.type === Syntax.FunctionExpression && node.id) {
+            this.scopeManager.__nestFunctionExpressionNameScope(node);
+        }
+
+        // Consider this function is in the MethodDefinition.
+        this.scopeManager.__nestFunctionScope(node, this.isInnerMethodDefinition);
+
+        const that = this;
+
+        /**
+         * Visit pattern callback
+         * @param {pattern} pattern pattern
+         * @param {Object} info info
+         * @returns {void}
+         */
+        function visitPatternCallback(pattern, info) {
+            that.currentScope().__define(pattern,
+                new ParameterDefinition(
+                    pattern,
+                    node,
+                    i,
+                    info.rest
+                ));
+
+            that.referencingDefaultValue(pattern, info.assignments, null, true);
+        }
+
+        // Process parameter declarations.
+        for (i = 0, iz = node.params.length; i < iz; ++i) {
+            this.visitPattern(node.params[i], { processRightHandNodes: true }, visitPatternCallback);
+        }
+
+        // if there's a rest argument, add that
+        if (node.rest) {
+            this.visitPattern({
+                type: "RestElement",
+                argument: node.rest
+            }, pattern => {
+                this.currentScope().__define(pattern,
+                    new ParameterDefinition(
+                        pattern,
+                        node,
+                        node.params.length,
+                        true
+                    ));
+            });
+        }
+
+        // In TypeScript there are a number of function-like constructs which have no body,
+        // so check it exists before traversing
+        if (node.body) {
+
+            // Skip BlockStatement to prevent creating BlockStatement scope.
+            if (node.body.type === Syntax.BlockStatement) {
+                this.visitChildren(node.body);
+            } else {
+                this.visit(node.body);
+            }
+        }
+
+        this.close(node);
+    }
+
+    visitClass(node) {
+        if (node.type === Syntax.ClassDeclaration) {
+            this.currentScope().__define(node.id,
+                new Definition(
+                    Variable.ClassName,
+                    node.id,
+                    node,
+                    null,
+                    null,
+                    null
+                ));
+        }
+
+        this.visit(node.superClass);
+
+        this.scopeManager.__nestClassScope(node);
+
+        if (node.id) {
+            this.currentScope().__define(node.id,
+                new Definition(
+                    Variable.ClassName,
+                    node.id,
+                    node
+                ));
+        }
+        this.visit(node.body);
+
+        this.close(node);
+    }
+
+    visitProperty(node) {
+        let previous;
+
+        if (node.computed) {
+            this.visit(node.key);
+        }
+
+        const isMethodDefinition = node.type === Syntax.MethodDefinition;
+
+        if (isMethodDefinition) {
+            previous = this.pushInnerMethodDefinition(true);
+        }
+        this.visit(node.value);
+        if (isMethodDefinition) {
+            this.popInnerMethodDefinition(previous);
+        }
+    }
+
+    visitForIn(node) {
+        if (node.left.type === Syntax.VariableDeclaration && node.left.kind !== "var") {
+            this.scopeManager.__nestForScope(node);
+        }
+
+        if (node.left.type === Syntax.VariableDeclaration) {
+            this.visit(node.left);
+            this.visitPattern(node.left.declarations[0].id, pattern => {
+                this.currentScope().__referencing(pattern, Reference.WRITE, node.right, null, true, true);
+            });
+        } else {
+            this.visitPattern(node.left, { processRightHandNodes: true }, (pattern, info) => {
+                let maybeImplicitGlobal = null;
+
+                if (!this.currentScope().isStrict) {
+                    maybeImplicitGlobal = {
+                        pattern,
+                        node
+                    };
+                }
+                this.referencingDefaultValue(pattern, info.assignments, maybeImplicitGlobal, false);
+                this.currentScope().__referencing(pattern, Reference.WRITE, node.right, maybeImplicitGlobal, true, false);
+            });
+        }
+        this.visit(node.right);
+        this.visit(node.body);
+
+        this.close(node);
+    }
+
+    visitVariableDeclaration(variableTargetScope, type, node, index) {
+
+        const decl = node.declarations[index];
+        const init = decl.init;
+
+        this.visitPattern(decl.id, { processRightHandNodes: true }, (pattern, info) => {
+            variableTargetScope.__define(
+                pattern,
+                new Definition(
+                    type,
+                    pattern,
+                    decl,
+                    node,
+                    index,
+                    node.kind
+                )
+            );
+
+            this.referencingDefaultValue(pattern, info.assignments, null, true);
+            if (init) {
+                this.currentScope().__referencing(pattern, Reference.WRITE, init, null, !info.topLevel, true);
+            }
+        });
+    }
+
+    AssignmentExpression(node) {
+        if (PatternVisitor.isPattern(node.left)) {
+            if (node.operator === "=") {
+                this.visitPattern(node.left, { processRightHandNodes: true }, (pattern, info) => {
+                    let maybeImplicitGlobal = null;
+
+                    if (!this.currentScope().isStrict) {
+                        maybeImplicitGlobal = {
+                            pattern,
+                            node
+                        };
+                    }
+                    this.referencingDefaultValue(pattern, info.assignments, maybeImplicitGlobal, false);
+                    this.currentScope().__referencing(pattern, Reference.WRITE, node.right, maybeImplicitGlobal, !info.topLevel, false);
+                });
+            } else {
+                this.currentScope().__referencing(node.left, Reference.RW, node.right);
+            }
+        } else {
+            this.visit(node.left);
+        }
+        this.visit(node.right);
+    }
+
+    CatchClause(node) {
+        this.scopeManager.__nestCatchScope(node);
+
+        this.visitPattern(node.param, { processRightHandNodes: true }, (pattern, info) => {
+            this.currentScope().__define(pattern,
+                new Definition(
+                    Variable.CatchClause,
+                    node.param,
+                    node,
+                    null,
+                    null,
+                    null
+                ));
+            this.referencingDefaultValue(pattern, info.assignments, null, true);
+        });
+        this.visit(node.body);
+
+        this.close(node);
+    }
+
+    Program(node) {
+        this.scopeManager.__nestGlobalScope(node);
+
+        if (this.scopeManager.isGlobalReturn()) {
+
+            // Force strictness of GlobalScope to false when using node.js scope.
+            this.currentScope().isStrict = false;
+            this.scopeManager.__nestFunctionScope(node, false);
+        }
+
+        if (this.scopeManager.__isES6() && this.scopeManager.isModule()) {
+            this.scopeManager.__nestModuleScope(node);
+        }
+
+        if (this.scopeManager.isStrictModeSupported() && this.scopeManager.isImpliedStrict()) {
+            this.currentScope().isStrict = true;
+        }
+
+        this.visitChildren(node);
+        this.close(node);
+    }
+
+    Identifier(node) {
+        this.currentScope().__referencing(node);
+    }
+
+    // eslint-disable-next-line class-methods-use-this
+    PrivateIdentifier() {
+
+        // Do nothing.
+    }
+
+    UpdateExpression(node) {
+        if (PatternVisitor.isPattern(node.argument)) {
+            this.currentScope().__referencing(node.argument, Reference.RW, null);
+        } else {
+            this.visitChildren(node);
+        }
+    }
+
+    MemberExpression(node) {
+        this.visit(node.object);
+        if (node.computed) {
+            this.visit(node.property);
+        }
+    }
+
+    Property(node) {
+        this.visitProperty(node);
+    }
+
+    PropertyDefinition(node) {
+        const { computed, key, value } = node;
+
+        if (computed) {
+            this.visit(key);
+        }
+        if (value) {
+            this.scopeManager.__nestClassFieldInitializerScope(value);
+            this.visit(value);
+            this.close(value);
+        }
+    }
+
+    StaticBlock(node) {
+        this.scopeManager.__nestClassStaticBlockScope(node);
+
+        this.visitChildren(node);
+
+        this.close(node);
+    }
+
+    MethodDefinition(node) {
+        this.visitProperty(node);
+    }
+
+    BreakStatement() {} // eslint-disable-line class-methods-use-this
+
+    ContinueStatement() {} // eslint-disable-line class-methods-use-this
+
+    LabeledStatement(node) {
+        this.visit(node.body);
+    }
+
+    ForStatement(node) {
+
+        // Create ForStatement declaration.
+        // NOTE: In ES6, ForStatement dynamically generates
+        // per iteration environment. However, escope is
+        // a static analyzer, we only generate one scope for ForStatement.
+        if (node.init && node.init.type === Syntax.VariableDeclaration && node.init.kind !== "var") {
+            this.scopeManager.__nestForScope(node);
+        }
+
+        this.visitChildren(node);
+
+        this.close(node);
+    }
+
+    ClassExpression(node) {
+        this.visitClass(node);
+    }
+
+    ClassDeclaration(node) {
+        this.visitClass(node);
+    }
+
+    CallExpression(node) {
+
+        // Check this is direct call to eval
+        if (!this.scopeManager.__ignoreEval() && node.callee.type === Syntax.Identifier && node.callee.name === "eval") {
+
+            // NOTE: This should be `variableScope`. Since direct eval call always creates Lexical environment and
+            // let / const should be enclosed into it. Only VariableDeclaration affects on the caller's environment.
+            this.currentScope().variableScope.__detectEval();
+        }
+        this.visitChildren(node);
+    }
+
+    BlockStatement(node) {
+        if (this.scopeManager.__isES6()) {
+            this.scopeManager.__nestBlockScope(node);
+        }
+
+        this.visitChildren(node);
+
+        this.close(node);
+    }
+
+    ThisExpression() {
+        this.currentScope().variableScope.__detectThis();
+    }
+
+    WithStatement(node) {
+        this.visit(node.object);
+
+        // Then nest scope for WithStatement.
+        this.scopeManager.__nestWithScope(node);
+
+        this.visit(node.body);
+
+        this.close(node);
+    }
+
+    VariableDeclaration(node) {
+        const variableTargetScope = (node.kind === "var") ? this.currentScope().variableScope : this.currentScope();
+
+        for (let i = 0, iz = node.declarations.length; i < iz; ++i) {
+            const decl = node.declarations[i];
+
+            this.visitVariableDeclaration(variableTargetScope, Variable.Variable, node, i);
+            if (decl.init) {
+                this.visit(decl.init);
+            }
+        }
+    }
+
+    // sec 13.11.8
+    SwitchStatement(node) {
+        this.visit(node.discriminant);
+
+        if (this.scopeManager.__isES6()) {
+            this.scopeManager.__nestSwitchScope(node);
+        }
+
+        for (let i = 0, iz = node.cases.length; i < iz; ++i) {
+            this.visit(node.cases[i]);
+        }
+
+        this.close(node);
+    }
+
+    FunctionDeclaration(node) {
+        this.visitFunction(node);
+    }
+
+    FunctionExpression(node) {
+        this.visitFunction(node);
+    }
+
+    ForOfStatement(node) {
+        this.visitForIn(node);
+    }
+
+    ForInStatement(node) {
+        this.visitForIn(node);
+    }
+
+    ArrowFunctionExpression(node) {
+        this.visitFunction(node);
+    }
+
+    ImportDeclaration(node) {
+        assert__default["default"](this.scopeManager.__isES6() && this.scopeManager.isModule(), "ImportDeclaration should appear when the mode is ES6 and in the module context.");
+
+        const importer = new Importer(node, this);
+
+        importer.visit(node);
+    }
+
+    visitExportDeclaration(node) {
+        if (node.source) {
+            return;
+        }
+        if (node.declaration) {
+            this.visit(node.declaration);
+            return;
+        }
+
+        this.visitChildren(node);
+    }
+
+    // TODO: ExportDeclaration doesn't exist. for bc?
+    ExportDeclaration(node) {
+        this.visitExportDeclaration(node);
+    }
+
+    ExportAllDeclaration(node) {
+        this.visitExportDeclaration(node);
+    }
+
+    ExportDefaultDeclaration(node) {
+        this.visitExportDeclaration(node);
+    }
+
+    ExportNamedDeclaration(node) {
+        this.visitExportDeclaration(node);
+    }
+
+    ExportSpecifier(node) {
+
+        // TODO: `node.id` doesn't exist. for bc?
+        const local = (node.id || node.local);
+
+        this.visit(local);
+    }
+
+    MetaProperty() { // eslint-disable-line class-methods-use-this
+
+        // do nothing.
+    }
+}
+
+/* vim: set sw=4 ts=4 et tw=80 : */
+
+const version = "7.2.2";
+
+/*
+  Copyright (C) 2012-2014 Yusuke Suzuki <utatane.tea@gmail.com>
+  Copyright (C) 2013 Alex Seville <hi@alexanderseville.com>
+  Copyright (C) 2014 Thiago de Arruda <tpadilha84@gmail.com>
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+/**
+ * Set the default options
+ * @returns {Object} options
+ */
+function defaultOptions() {
+    return {
+        optimistic: false,
+        directive: false,
+        nodejsScope: false,
+        impliedStrict: false,
+        sourceType: "script", // one of ['script', 'module', 'commonjs']
+        ecmaVersion: 5,
+        childVisitorKeys: null,
+        fallback: "iteration"
+    };
+}
+
+/**
+ * Preform deep update on option object
+ * @param {Object} target Options
+ * @param {Object} override Updates
+ * @returns {Object} Updated options
+ */
+function updateDeeply(target, override) {
+
+    /**
+     * Is hash object
+     * @param {Object} value Test value
+     * @returns {boolean} Result
+     */
+    function isHashObject(value) {
+        return typeof value === "object" && value instanceof Object && !(value instanceof Array) && !(value instanceof RegExp);
+    }
+
+    for (const key in override) {
+        if (Object.prototype.hasOwnProperty.call(override, key)) {
+            const val = override[key];
+
+            if (isHashObject(val)) {
+                if (isHashObject(target[key])) {
+                    updateDeeply(target[key], val);
+                } else {
+                    target[key] = updateDeeply({}, val);
+                }
+            } else {
+                target[key] = val;
+            }
+        }
+    }
+    return target;
+}
+
+/**
+ * Main interface function. Takes an Espree syntax tree and returns the
+ * analyzed scopes.
+ * @function analyze
+ * @param {espree.Tree} tree Abstract Syntax Tree
+ * @param {Object} providedOptions Options that tailor the scope analysis
+ * @param {boolean} [providedOptions.optimistic=false] the optimistic flag
+ * @param {boolean} [providedOptions.directive=false] the directive flag
+ * @param {boolean} [providedOptions.ignoreEval=false] whether to check 'eval()' calls
+ * @param {boolean} [providedOptions.nodejsScope=false] whether the whole
+ * script is executed under node.js environment. When enabled, escope adds
+ * a function scope immediately following the global scope.
+ * @param {boolean} [providedOptions.impliedStrict=false] implied strict mode
+ * (if ecmaVersion >= 5).
+ * @param {string} [providedOptions.sourceType='script'] the source type of the script. one of 'script', 'module', and 'commonjs'
+ * @param {number} [providedOptions.ecmaVersion=5] which ECMAScript version is considered
+ * @param {Object} [providedOptions.childVisitorKeys=null] Additional known visitor keys. See [esrecurse](https://github.com/estools/esrecurse)'s the `childVisitorKeys` option.
+ * @param {string} [providedOptions.fallback='iteration'] A kind of the fallback in order to encounter with unknown node. See [esrecurse](https://github.com/estools/esrecurse)'s the `fallback` option.
+ * @returns {ScopeManager} ScopeManager
+ */
+function analyze(tree, providedOptions) {
+    const options = updateDeeply(defaultOptions(), providedOptions);
+    const scopeManager = new ScopeManager(options);
+    const referencer = new Referencer(options, scopeManager);
+
+    referencer.visit(tree);
+
+    assert__default["default"](scopeManager.__currentScope === null, "currentScope should be null.");
+
+    return scopeManager;
+}
+
+/* vim: set sw=4 ts=4 et tw=80 : */
+
+exports.Definition = Definition;
+exports.PatternVisitor = PatternVisitor;
+exports.Reference = Reference;
+exports.Referencer = Referencer;
+exports.Scope = Scope;
+exports.ScopeManager = ScopeManager;
+exports.Variable = Variable;
+exports.analyze = analyze;
+exports.version = version;
+//# sourceMappingURL=eslint-scope.cjs.map